8.2 Review
Name________________________________
Chemical Equations
Period_______Date_____________________
DIRECTIONS:
Refer to the unbalanced chemical equation below to answer the following questions.
Write your answers in the space provided.
Al(NO3)3
+
FeCl2
→
Fe(NO3)2
+
AlCl3
1. Write the names of the reactants in this equation:
_______________________________________
_____________________________________
2. Write the names of the products in this equation:
_______________________________________
3. Balance the equation above.
_____________________________________
What is the coefficient for Al(NO3)3? ___________
What is the coefficient for FeCl2?
___________
What is the coefficient for Fe(NO3)2? ___________
What is the coefficient for AlCl3?
___________
4. How many oxygen atoms are there on each side of the balanced equation? __________
5. What should you do if an equation you have written cannot be balanced? ________________________
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6. How is balancing an equation related to the Law of Conservation of Matter? _____________________
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7. Describe the correct way to balance an equation: ___________________________________________
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8. How are the physical states of the reactants and products indicated in a chemical equation? __________
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DIRECTIONS: Write balanced chemical equations for each of the following reactions. Indicate the
physical state of the reactants and products (ex – s,g,l,aq).
9. Hydrogen gas reacts with nitrogen gas to produce ammonia gas (NH3).
10. Hydrogen bromide gas reacts with oxygen gas to produce liquid water and bromine gas.
11. When a solid piece of magnesium is placed in hydrochloric acid, hydrogen gas bubbles off and
magnesium chloride is left in solution.
12. Hydrochloric acid can be added to calcium carbonate to produce calcium chloride in solution, carbon
dioxide gas and water.
13. Solid carbon disulfide can be used to form carbon dioxide gas and sulfur dioxide gas when it reacts
with oxygen gas.
14. Solid manganese dioxide reacts with hydrochloric acid to produce manganese (II) chloride, liquid
water and chlorine gas.